Welding and brazing tool.



2O provide a safety cheek against flash-back in d UNITED STATES PATEN T OFFICE;

RUDOLPH E. BRUCKNER, 0F lVlIOUNi.` VERNON, NEW YORK, ASSIGNOR TO UOMMEQIAL ACETYLENE COMPANY, OF NEVI YORK, N. Y., A CORPORATION 0F NEW JERSY.

Wnnmni AND BRA'ZING Toor..

Specification of Letters Patent.

I atented Sept. 28, 1909.

ippiication filed January 22, 1909. Serial No. 473,703.

. To all whom it may concern:

Be it known that l, Vltunonrir E. llnnoii- Nnn, a citizen of the United States, residing at Mount Vernon, county of Westchester, State of New York, have invented certain new and useful Improvements in Welding` and Brazilie; lools, of which the following;` is a full, cle: and exact description.

My invention relates to impriwements in weldingi` or brak/.ingtools of the type in which Vthe heating eti'ect lnfoductal by a combined oxygen and acetylene ilaine.

The object of the invention is to provide for adjustment between the hptd and the body or handle of the tool Whc-.eby the burner tip may be more conveniently positioned for operation upon differcntDclasses of Work.

A further object ofthe invention'is to the acetylene tube. A further object is to improve the construction aiid arrangement of parts of the head and tip whereby the greatest heating effects may be Secured with the minimum consumption of gas.

With these and other objects in View, the invention consists in the construction and arrangement of parts, a preferred embodiment of which is illustrated in the accompanying drawings, in which, u

Figure l is a plan view partly in section of a device embodying my invention. Fig. 2 is a side elevation of the device. Fig. 3 is a detail sectional view of the head and tip. Fig. i is a. cross sectional view through the rear end of the tool. Fig. 5 shows a modified form of the head and tip.

Referring to Figs. l to et inclusive, the embodiment of my invention selected for illustration comprises a head l having lateral inlets 2 and 3 Which'coinmunicate respectively with the oxygen supply tube 4 and the acetylene supply tube 5. i

0f metal, the head and tip of the tool may he' positioned at a right angle to the tool In ordinary cases -or where work is heilig performed upon more or less heavy masses body, as usual, whereby the jet is directed at a right angle to the surface of the work y while the body of the tool is held substantiaily parallel to the work. Where, how- Vever, workl is being' performed upon thi-n sheet metal, such direct action of the jet would telid'to burn a hole in the thin sheet rather than heat it to the proper temperature t'or weldingr or brazilie. lt is essential thereforeI in such cases to temper more or less the heatingi c'tl'ect of the iet which may be done by directing` it at an angle to the .surface to bc heated. in the case of large itat surfaces, such as presented by lare'e .sheets of sheet metal, this is przuzticaily inipossible when the iet onhead is iixcd at a.

4right. angle to the body of the tool, as illus- .tratcd m Fig. 2, it'or, owingl to the length of the tool body, it is impossible to tilt the same sutliciently over the work to direct the llame at the necessary angle to the surface without moving` the tip so fai' away fi'om the sui'- `face as to render the heating etiect inadequate. To remedy this defect the connection between the head and tool body in my improved device is soiarrangcd, that the head may be rotated or adjusted t0any desired angle to the tool body whereby the head and tip may be conveniently positioned either-at a right angle to the tool body, as illustrated in F ig. 2, or may be turned to direct the 4jet at any desired angle to the work surface. For this purpose the head l is provided with threaded bosses '7 and S, to which the tubes 4 and 5 respectivelpv are secured by means of the screw caps t) and l0 respectively. The screw caps may be tightened snHiciently to afford iirm frictional hold for the head in any of its adjusted positions.

lVithinthc head l is a central chamber or. l

passage 1i. This chamber, as shown in iig. his tapered to 'receive a corresponding-ly tapered tip l2, which tip is provided y with an annular groove or cut-away portion forming,r analinular chanzbei l, with which the inlet 3 from the acetylene tube 5 communicates when the tip l2 is in position. The tip is so proportioned as not to reach entirely to the bottom of the chamber 11, whereby space is left at the inner end of said chamber, with which the inlet 2 from thc oxygen tube communicates. The tip l', fnrthermore, is -provided with a tapered passage let opening into the chamber il at;- l-it, cwhereby it communicates with the oxygen inlet Q, and said plug also has lateral passages 15 communicating with the annular chamber i3, which in turn is in communication with the acetylene inlet l'l.- The opening' ist at the inner end of the passage ist4 and the openings l5 are so relatively proportioned as to admit the oxygen and acetylene ,gases in the propeil propm'tionsat their r- .spcctive pressures to the passage 1d to produre the desired mixture. Upon the outer endot the tip 12 is mounted an extension such as l2, Fig; il, which for dilteren't sizes ot tips may be ot substantially the same diameter' but vary in length andn in the dialneters oi their exits 16 to accord with the character oi? ivorlr to be performed. For the liner or lighter work, shorter extensions having tiner openings or exits are employed. The passage .lll in the tip 19. is so designed in diameter and length as-te iorrn with the particular extension attached thereto a mixing chamber properly proportionedwvith respect to the orifice 16 ot the extension to produce a mixture of gas which will allord the most clhcient flame for the particular worlt operated. upon.

ln the inodilied iorin of tip shown in Fig. 5, the same comprises a tapered portion 122 having the annular groove 13 to itorin the annular acetylene chamber. The passage 141C2 in this tip, however, is oi' uniform di an eter throughout both the body portion 122 and the extension 1Q and connnunicates with the chamber 11 and thence with the oxygen inlet 3 by a small orifice '14. 'llie acetylene inlets 15 in this form of tip are as shown located closely adjacent the orifice 1413 whereby the oxygen jet entering` therethrough into the passage 1112 will draw the acetylene gas into said chamber.

rEhe oxygen and acetylene tubes are held rigidly together' by brackets 17 and 1S, and their rear ends extend removably into a cylindrical. shell 1l) forming aV handle for the tool. he rear end ot' the oxygen tube is detach: )ly seated in the forward end o't a tube 20, mounted in said shell, and which extends through the -rear thereof and is provided with a stop cock 21 and a liexiblc gas tube connection 22. The rear end of the acetylene tube, which extends wellinto the shell, has mounted thereon a valve chaniber QB provided with a. valve seat A upon which is seated a sin-all disk-.lil:e valve The valve 9,5 is held against the valve scat by a spiral spring 2G smfrounding the rear end ot the 4acetylene tube and extending between said valve and the forward end of' the valve chamber. 'llie rear end ol' the acetylene tribe is closely mijaccnt to the valve i'i and oci vos as a stop therefor when thevalve opeusninler pressure of the acetylene gas and aan i fist pres-- sure ot the splfnipr 245, and that parlion ol tini acetylene tube within the 'valve rhan'iber provided with lateral pertoratious 27 lo admit llic gas from the supply cock 28, which latte :s provided with suitable commotion lll lor a lexiblc tube oonnnunieatirnf with the acetylene supply. liy means et iis valve constaiicion at the 'rear end oi.2 the acetylene telic, all dam," et a Hash-back in ne tool `acetylene supply tanli; ior, as well known,

the compression caused by such flash always jLin'ccedcs the ilaine of the ilasl i slim i such Hash-back take place, such conipressioa` o' the gas within the acetylene tube would reach the valve Q5 in advance of the liazne and close said valve before said iianie could pass beyond it. This valve, theretore, acts as an cl'l'ective check to prevent all danger ot' explosion ot the acetylene supply from the flash. lt is to be noted that the bracket 18 is formed in two parts which are clamped together by a suitable screw 18, upon loosening oi: which the braciet may be slid along the tubes and permit the opening oi 'the A 12) olf the cylinder 1S), to aii'ord access to the interior thereof and to facilitate the iss-enr bling ci the apparatus.

liVhile l have herein disclosed a particular embodiment of my invention, it anderstood the same may be varied in details and relative arrangement of parts without departing,l from the spirit or scope thereof.

1V hat l claim is: n

1.` in a hand welding and brazingl tool, a body portion comprising a plurality of rigid gas condineting tubes forming an elongated handle i'or said tool, means at the rear end of said handle 'l'or connecting flexible tubes to said rigid tubes, and a head adjustably mounted upon the opposite end ci' said handle and arranged to be adjusted at different angles thereto.

:2. A welding and brazinp; tool comprising a head, gas supply tube communicating therewith, a valve chan'iber located at the inner end of said tube, a check valve seated in said chamber and interposed between the valve seat and the end ot said tube.

23. 'in a welding and brazing tool, a gas supply tube, a valve chamber mounted upon the rear end thereof, a 'valve seat in said chamber located opposite the end of said tube, a valve interposed between the end of the tube and said valve seat, and a spring` surroululing said tube and arranged to hold said valve upon its scat.

4. 'l i a welding` and blazing; tool, a. head, a gas supply tube communicating therewith, a valve chamber mounted upon the rear end ol said tube, a valve located in said chamber and closely adjacent to the end of said tube, means for holding said valve yieldiinly against its seat, said tube arranged to act a stop lor said valve when opened by pres sure oi the gas supply. l

ln a welding and ln'aziug tool, a head, `gas supply tube immmunioating therewith, a valve chamber incl'osinfel the rear end of said tube, a valve seat in said chamber, a valve interposed between the end or" said tube and said valve seat, means to hold said -valve yielding'ly upon its seat, the end of said tube being arranged to act as a stop for said valve when opened by pressure of the gas supply, that portion of the tube Within the valve chamber being provided With perforations for the admission of the gasto said tube.

6. In a Welding and brazing tool, a head having a tapered passage therein, a gas inlet communicating with the rear end of said passage, a tip comprising a'tapered portion fitting Within said passage and having;- a mixing chamber therein communicating With vsaid passage, .an annular passage surrounding` said tapered portion, a second gas inlet in said head eonnnunieatingwith said annular passage, and passages in said tip between said annular passage and said inixing chamber.

7. In a Welding' and brazing tool, a. head .having a tapered passage therein for the reception of a tip'and a tip harina` a tapered portion itting Within said passage and forniing` `gas-tight joints therewith, and a mixing` chamber irithinsaid tip, said tipharing gas inlets and an outlet orifice.

S. In a Welding and brazing tool, a head having a tapered passage therein, a tip having a tapered portion fitting within said passage, an annular passage intermediate of the ends of said tapered portion, those portions of said tip on either side o't' said annular passage forming `as-tight joints with the Walls of said tapered passage, said tip having,` gas inlets eonnnnnieating' with said tapered passage and said annular passage and having a gas orifice.

RUDOLPH E. BRUCKNIGR. lvil'nesses NI. ll. Gannlrij'r, il. XV. PownLL. 

